Dumb-waiter signal



W. MISIAK DUMB WAITER- SIGNAL Oct. 9, 1923. 1,470,466

il 21 1921 2 Sheets-Sheet l A I l 1 INVENTOR ATTORNEY W. .MISIAK DUMB .WAITER SIGNAL Oct. 9

' Filed Feb. 21. 1921 2 Sheets-Sh eet 2 5 ATTORNEY Patented Deli. 9, 1923.

UNITED STATES WLODZIMIERZ MISIAK, OF NEW YORK, N. Y.

DUMB-WAITER SIGNAL.

Application filed February 21, 1921. Serial No..446,658.

T all whom it may concern:

Be it known that I, VVLonzIMIEnz MIsIAK, citizen of the United States, and resident of New York. in the county of New York and State of New York, have invented certain new and useful Improvements in Dumb- VVaiter Signals, of which the following is a specification. f

This invention relates to dumb waiters,

19 having more particular reference to a signal system adapted for use in connection therewith. e

j The invention has for an object to provide a novel arrangement and construction of parts whereby a general signal may be given in the apartments on the different floors when. the dumb waiter is moving either up or down or whereby a signal may be given which would only be audible on any floor of which the door leading to the dumb waiter shaft was open.

. For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the followingdescription andv accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

Fig. 1 of the drawings is a vertical elevat-ional view showing the application of the invention to a dumb waiter, the dumb waiter shaft being shown in vertical section.

, Fig. 2 is a plan view of the variable contact maker carried by the dumb waiter car. as Fig. is a side view thereof.

Fi 4 is a front view thereof.

Fig. 5 is an enlarged detail sectional view on the line 5-5 of Fig. 3.

Fig. 6 is a top plan view of the dumb 40 waiter with the battery and contact maker mounted thereon.

Fig. 7 is an enlarged detail section on the line 77 of Fig. 3.

Fig. 8 is a front view of the dumb waiter 45 equipped as in Fig. 6.

Fig. 9 is a side view thereof.

Fig. 10 is an enlarged fragmentary front elevation of the track carrying the fixed contacts.

to In the drawings 10 indicates a dumb waiter shaft which extends upward past the different floors 11 of the apartment house or other building in which the dumb waiter is located. The dumb waiter car is shown at 55 12 and may be operated by the usual ropes 13, the parts already referred to being of any suitable or usual construction, the dumb waiter shaft having the usual openings 14 communicating with the respective floors of the building.

According to my invention I provide in the dumb waiter shaft a vertical track 1.7 upon which are a number of contact members located adjacent each floor of the building. These fixed contacts comprise, for each floor, a pair of vertically spaced, relatively wide contact strips 20, having on opposite sides thereof the relatively narrow contact strips 21, 21, these contacts being located adjacent the openings 14.

Mounted on the top of the dumb waiter is a guide base 23 on which is slidably mounted a plate 24 haying a bearing car 25 at one end. This plate is hereshown as secured to the base by means of a wing nut 26 threaded on a screw 27 fixed to the base 23 and projecting up through a slot 28 in the plate 24. Pivoted at its lower end as at 29 to the bearing car 25 is a post 30 having a lever 31 fulcrumed as. at 32 to the upper end thereof, the lever being fulcrumed between its ends and having one arm formed in two diverging forks 31 and 31 This lever 31 is adapted to be held. in different vertically adjusted positions by a link 34. connected at one end to the unforked arm thereof and having its opposite end loner tudinally slotted as at to receive a screw 36 projecting from the post, a wing nut 37 being threaded on said screw and clamping the link to the post.

The arm 31 of the lever 31 is formed with a yoke-like extension in which is journaled a single roller 40, this roller being suitably insulated as at 41, the length of this roller corresponding to the distance between the outer edges of the fixed cont-act strips 2 or 21. with which it is adapted to engage.

The arm 31* of lever 31 also has a yokelike extension upon which is journaled a pair of rollers 42 each of which is insulated as at 43 these rollers being lz'tterally spaced so as to engage the centre contact strips 20 I or 20. but not touch the side contact strips 21, 21'. A pair of flat springs 44; are secured at one end by screws 45 to the plate 24 and. press the post 30 toward the track 17.

Mounted upon each of the different floors is a bell 47 adapted to ring when. the contact strips 21 or 21 adjacent the respective floors are bridged. The wiring connections to these bells are in parallel and comprise the two main wires d8 and 19 leading from a suitably placed battery 50. From the wire -18 branch wires 51 lead to the contact strips 21, 21' on one side of the central strips 20 and from the contact strips on the other side of such central strips wires 52 lead to one terminal of the bell ii, the other terminal of which is connected to the main wire as indicated at 53.

Mounted on the car 12 are a bell 55 and a battery 56, which are connected by a lead 5? whose opposite ends are connected to the respective rollers 12, as indicated in Fig. the roller spindles 12 being extended to farm binding posts and provided with binding nuts 58.

By adjusting the lever 31 to either the full line or dotted line position shown in Fig. 3 the single roller atO or the pair of rollers -12 may be brought to bear on the track 17. lVhen the single roller is bearing on the track the contacts 21 or :21 will be bridged as the car 12 comes adjacent the different openings 14 and the bells 47 on the floors will be caused to ring. If, however the pair of rollers 42 are bearing on the track the circuit to the bell 55 carried by the car 12 will be closed as the car comes adjacent each opening 14; by reason of the contact 20 bridging said rollers. By providing the vertically spaced sets of contacts adjacent each opening let the signal is given as the car moves either up or down while the signal ceases operation when the car is at rest adjacent the opening, in which position the contact element on the car is between the spaced sets of fixed contacts.

In the use of the dumb waiter tenants on any floor expecting the delivery of goods may leave the opening to the dumb waiter shaft unelosed, the person operating the dumb waiter then setting the signal device so that the bell on the car will sound. If goods such as milk are to be delivered to all the doors the signal device is set to cause the bells 47 on said floors to sound.

Having thus described my invention what I claim as new and desire to protect by Letters Patent of the United States is as follows:

1. In a dumb waiter, a shaft vtu'tically intersecting the different floors of a building. signals on the respective floors. a car, a signal carried by the car. and selective means whereby either of said signals may be caused to operate as the car comes adjacent; the respective floors, said means including a track in said shaft, spaced contacts on said track, and a forked arm pivoted on the car and means for shifting said "forked arm to bring either branch thereof into engagement with said track.

In a. dumb waiter, a shaft, :1 car in said shaft, a track in said shaft, groups of contact strips on said track, each group com prising a central strip and a pair of side strips, a signal carried by said car, a series of tixed signals, and means carried by the ear whereby a circuit may be closed either through said centre strip and the car signal. or through the side strips and a corresponding fixed signal.

3. In a dumb waiter, a shaft, a car in said shaft, a track in said shaft, groups of contact strips on said track, each group comprising a central strip and a pair of side strips, a signal carried by said car, a series of fixed signals, and means carried by the car whereby a circuit may be closed either through said centre strip and the car signal, or through the side strips and a corresponding fixed signal, said means comprising a forked arm one branch of which carries a single roller, and the other branch a pair of insulated rollers.

4. In a dumb waiter, a shaft, :1 car in said shaft. a track in said shaft, groups of contact strips on said track, each group comprising a central strip and a pair of side strips, a signal carried by said car, a series of fixed signals, and means carried by the car whereby a circuit may be closed either through said centre strip and the car signal, or through the side strips and :1 corresponding fixed signal, said means comprising a forked arm one branch of which carries a single roller, and the other branch a pair of insulated rollers, a pivoted post on which said arm is mounted, and a slotted link device for adjustably positioning said arm with respect to said post.

In a dumb waiter, a shaft, :1 car in said shaft, a track in said shaft, groups of contact strips on said track, each group comprising a central strip and a pair of side strips, a signal carried by said car. a series of fixed signals. and means carried by the car whereby a circuit may be closed either through said side strips and the car signal, or through the centre strip and a corre' sponding tixcd signal, said means comprising a forked arm one branch of which carries a single roller. and the other branch a pair of insulated rollers. a pivoted post on which said arm is mounted. and a slotted link device for adjustably positioning said arm with respect to said post. and a spring pressing said post toward the said track.

Signed at New 1 ork, in the county of New York. and State of New York, this 16th day of February, A. D. 1921.

WLODZIMIERZ ,MISIAK. 

